<!DOCTYPE html>
<html lang="en">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0">
  <title>大众点评</title>
  <!-- 引入样式 -->
  <link rel="stylesheet" href="./css/element.css">
  <link href="./css/index.css" rel="stylesheet">
  <link href="./css/main.css" rel="stylesheet">

  <style type="text/css">
    .el-input__inner {
      border-radius: 20px;
    }
  </style>
</head>
<body>
<div id="app">
  <div class="search-bar">
    <div class="city-btn">{{info.city}}<i class="el-icon-arrow-down"></i></div>
    <div class="search-input">
      <el-input size="mini" placeholder="请输入商户名、地点">
        <i slot="prefix" class="el-input__icon el-icon-search"></i>
      </el-input>
    </div>
    <div class="header-icon" @click="toPage(4)"><i class="el-icon-user"></i></div>
  </div>
  <div class="type-list">
    <div class="type-box" v-for="t in types" :key="t.id" @click="toShopList(t.id, t.name)">
      <div class="type-view"><img :src="'/imgs/' + t.icon" alt=""></div>
      <div class="type-text">{{t.name}}</div>
    </div>
  </div>
  <div class="blog-list" @scroll="onScroll">
    <div class="blog-box" v-for="b in blogs" :key="b.id">
      <div class="blog-img" @click="toBlogDetail(b)"><img :src="b.img" alt=""></div>
      <div class="blog-title">{{b.title}}</div>
      <div class="blog-foot">
        <div class="blog-user-icon"><img :src="b.icon || '/imgs/icons/default-icon.png'" alt=""></div>
        <div class="blog-user-name">{{b.name}}</div>
        <div class="blog-liked" @click="addLike(b)">
          <svg t="1646634642977" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="2187" width="14" height="14">
            <path d="M160 944c0 8.8-7.2 16-16 16h-32c-26.5 0-48-21.5-48-48V528c0-26.5 21.5-48 48-48h32c8.8 0 16 7.2 16 16v448zM96 416c-53 0-96 43-96 96v416c0 53 43 96 96 96h96c17.7 0 32-14.3 32-32V448c0-17.7-14.3-32-32-32H96zM505.6 64c16.2 0 26.4 8.7 31 13.9 4.6 5.2 12.1 16.3 10.3 32.4l-23.5 203.4c-4.9 42.2 8.6 84.6 36.8 116.4 28.3 31.7 68.9 49.9 111.4 49.9h271.2c6.6 0 10.8 3.3 13.2 6.1s5 7.5 4 14l-48 303.4c-6.9 43.6-29.1 83.4-62.7 112C815.8 944.2 773 960 728.9 960h-317c-33.1 0-59.9-26.8-59.9-59.9v-455c0-6.1 1.7-12 5-17.1 69.5-109 106.4-234.2 107-364h41.6z m0-64h-44.9C427.2 0 400 27.2 400 60.7c0 127.1-39.1 251.2-112 355.3v484.1c0 68.4 55.5 123.9 123.9 123.9h317c122.7 0 227.2-89.3 246.3-210.5l47.9-303.4c7.8-49.4-30.4-94.1-80.4-94.1H671.6c-50.9 0-90.5-44.4-84.6-95l23.5-203.4C617.7 55 568.7 0 505.6 0z" p-id="2188" :fill="b.isLike ? '#ff6633' : '#82848a'"></path>
          </svg>
          {{b.liked}}
        </div>
      </div>
    </div>
  </div>
  <foot-bar :active-btn="1"></foot-bar>
</div>
<script src="./js/vue.js"></script>
<script src="./js/axios.min.js"></script>
<!-- 引入组件库 -->
<script src="./js/element.js"></script>
<script src="./js/common.js"></script>
<script src="./js/footer.js"></script>
<script>

  const app = new Vue({
    el: "#app",
    data: {
      isReachBottom: false,
      types: [], // 类型列表
      blogs: [], // 播客列表
      current: 1, // blog的页码
      scrollEnd: false,  // 是否已滚动到页面底部
      totalPages: 0, // 最大总页数
      info:JSON.parse(sessionStorage.getItem("userInfo"))
    },
    created() {
// 查询类型
      this.queryTypes();
      this.queryHotBlogsScroll();

      window.addEventListener('scroll', this.handleScroll);
    },
    methods: {
      handleScroll() {
        const windowHeight = 'innerHeight' in window ? window.innerHeight : document.documentElement.offsetHeight;
        const body = document.body;
        const html = document.documentElement;
        const docHeight = Math.max(body.scrollHeight, body.offsetHeight, html.clientHeight, html.scrollHeight, html.offsetHeight);
        const windowBottom = windowHeight + window.pageYOffset;

        if (windowBottom >= docHeight && !this.scrollEnd) {
          this.scrollEnd = true;
          this.loadNextPage();
        }
      },
      // loadNextPage() {
      //   this.current += 1;
      //   this.queryHotBlogsScroll();
      // },
      loadNextPage() {
        if (this.current > this.totalPages) {
          return;
        }
        this.current += 1;
        this.queryHotBlogsScroll();
      },
      queryTypes() {
        axios.get("/shop-type/list")
                .then(({ data }) => {
                  this.types = data;
                })
                .catch(err => {
                  this.$message.error(err);
                });
      },
      // queryHotBlogsScroll() {
      //   axios.get("/blog/hot?current=" + this.current)
      //           .then(({ data }) => {
      //             data.forEach(b => (b.img = b.images.split(",")[0]));
      //             this.blogs = this.blogs.concat(data);
      //             this.scrollEnd = false; // Reset scrollEnd flag
      //           })
      //           .catch(err => {
      //             this.$message.error(err);
      //           });
      // },
      queryHotBlogsScroll() {
        axios.get("/blog/hot?current=" + this.current)
                .then(({ data }) => {
                  // 提取最大总页数
                  this.totalPages = data.totalPage;
                  // 提取当前页数据
                  const records = data.records;
                  records.forEach(b => (b.img = b.images.split(",")[0]));
                  this.blogs = this.blogs.concat(records);
                  this.scrollEnd = false; // Reset scrollEnd flag
                })
                .catch(err => {
                  this.$message.error(err);
                });
      },
      addLike(b) {
        axios.put("/blog/like/" + b.id)
                .then(({ data }) => {
                  this.queryBlogById(b);
                })
                .catch(err => {
                  this.$message.error(err);
                });
      },
      queryBlogById(b) {
        axios.get("/blog/" + b.id)
                .then(({ data }) => {
                  b.liked = data.liked;
                  b.isLike = data.isLike;
                })
                .catch(() => {
                  this.$message.error("Failed to query blog!");
                  b.liked++;
                });
      },
      onScroll(e) {
        let scrollTop = e.target.scrollTop;
        let offsetHeight = e.target.offsetHeight;
        let scrollHeight = e.target.scrollHeight;
        if(scrollTop + offsetHeight + 1 > scrollHeight && !this.isReachBottom){
          this.isReachBottom = true
          console.log("触底")
          this.current++
          this.queryHotBlogsScroll(this.current)
        }else{
          this.isReachBottom = false
        }
      },
      toShopList(id, name) {
        location.href = "/shop-list.html?type=" + id + "&name=" + name;
      },
      toBlogDetail(b) {
        location.href = "/blog-detail.html?id=" + b.id;
      }
    }
  });
</script>
</body>
</html>